In the 1950s, science fiction writer Isacc Asimov, who wrote the Law of Robotics and I Robot, seriously put forward the idea of pursuing the development of AI ("cybernetics"), saying: "Cybernetics is not just another branch of science. It is an intellectual revolution that rivals in importance the earlier Industrial Revolution." In 1950, Turing published his landmark paper Computing Machinery and Intelligence, which questioned whether machines could think, or possess intelligence. Turing pointed out that the definition of'intelligence' was debatable, and reasoned that if a machine could appear to think just like a human it could be considered intelligent. The Turing test was born.